The statutory ceiling
This rate is set by statute rather than bid down at the sale, so every certificate sold carries it. Competition happens on price instead. There is no statutory minimum return.
No minimum rate
Missouri sets no statutory minimum return. Because the rate is not bid down, competition shows up in the price instead, which is what erodes your yield.
How interest accrues
The certificate of purchase states its own rate of interest, and that rate may not exceed 10 percent per year. Interest runs on the purchase money named in the certificate together with the costs of sale. No interest is owed on any amount a purchaser paid above the delinquent taxes due plus the collector's costs of sale. Subsequent taxes the holder pays earn 8 percent per year. Missouri sets no minimum return, so a certificate redeemed early pays only the interest that actually accrued, and a deposit of the redemption amount with the collector stops any further interest or penalty. The statutes fix no compounding method or accrual start date beyond the terms written on the certificate, so confirm both with the collector.
How the bidding works
Missouri does not bid the interest rate down. The collector fixes the rate on the certificate of purchase, subject to a statutory ceiling of 10 percent per year, and bidders compete on price instead. A parcel at a first or second offering sells only when someone bids at least the delinquent taxes, interest, penalty and costs, and the parcel goes to the bidder who offers the most. Everything paid above the taxes and costs is surplus. The collector pays it into the county treasury, and no interest is owed on that excess to anyone, so a heavy premium is idle capital that dilutes the yield rather than a bid for a higher return.
When the certificates sell
The collector holds the delinquent land tax sale on the fourth Monday in August each year, starting at ten o'clock in the morning in or adjacent to the county courthouse, and continues it from day to day until every parcel has been offered. The delinquent list runs in a local newspaper once a week for three consecutive weeks beforehand, with the last insertion at least 15 days before the sale.
The headline figure is a ceiling, not a forecast. To see what a certificate actually pays over a real holding period, run the numbers in the yield calculator, and compare Missouri against other states on interest rates by state.
Verified Aug 18, 2026 against Missouri statutes.
Tax Sale Atlas publishes educational information about public tax sale processes. This is not legal, financial, or investment advice. Rules, dates, and fees change; confirm with the county office before you bid.